What I have observed (and this BTW is in accordance with Sals observations as well) is that in pure cutting a SPYDERCO serrated blade will last about twice as much as the plain edged will.
Lets examine though the various facets of the use of an EDC knife. In doing so, we will assume that we examine the same knife in two different versions: one with a PE and one with a SE. I personally carry a SE POLICE which I have customized its handle thus increasing its grip significantly.
If I want to open a plastic bag, I just use the tip of it and the bag will open cleanly in a blink of an eye. If I want to sharpen a pencil, it is easily done by using one of the broad serrations and I just push cut from there on. In fact, I suggest you try it out your self and you will amazed by how easily you will get a very sharp pencil! Then again, I have to tell you that I keep my POLICE hair splitting sharp, thanks to the SHARPMAKER. I mean, if I barely run it down my forearm I will get a hairless swath before I know it it gets that sharp! On any synthetic material the SE will the lead the way Vs. the PE.
Now, I must admit that for certain applications that require a very fine cutting the PE has its merits: for slicing and dicing I would rather choose a PE knife. However, try to cut something that has a hard crust on it with a PE and then with a SE and then you will see for your self which one has the advantage: clearly the SE! The SE with sharp serrations will also cut a tomato much easier than the PE.
What about letter opening? There, since this is more like a push cut operation, the PE is better suited. This doesnt mean though that the SE will not cut it open but it will give more of a jigged cut.
Finally, lets talk about the bad time at which you will have to resort to your knife to defend your self and / or your loved ones. To me, it is beyond any doubt that the SE blade will produce a much deeper cut by about 50% than the PE. When someone has to cut an opponent, he or she needs to perform a cut similar to cutting a stake; in other words, they have to run the length of the blade over their target and not hack through it. This is what Mike Janich also advocates in his book Knife Fighting A Practical Course. Besides, hacking is better suited to large blades and not blades in the range of 3 to 4 inches.
Of course, it takes more to sharpen a serrated blade but if you get it right, I think the outcome is really worth the extra labor grease. As far as a sharp tip is concerned, all the following models will give you that: DELICA, NATIVE, MILITARY, PARA-MILITARY, RESCUE (C14BL) and POLICE. Of all these knives, the RESCUE (C14BL) will give you a sharp tip but not a pointed one. Furthermore, the MILITARY will give the most tip in terms of length.
I hope that helps,
George
